Abstract: Water management has become a critical concern due to rapid urbanization and increasing water demand. Conventional water tank systems rely on manual motor operation, which often results in water overflow, wastage of electricity, and increased human effort. This paper presents the design and implementation of an IoT based Smart Water Tank Control and Monitoring System that automatically controls the water pump and inlet valve based on real-time water level data. The system employs an Arduino ATmega328 microcontroller for local control and a NodeMCU ESP8266 module for cloud connectivity. Water level sensing is achieved using level sensors, and the system status is transmitted to a Firebase cloud platform, enabling remote monitoring and control through a mobile application. Manual override functionality is also incorporated to ensure reliability during network or system failures. The proposed system improves water conservation, reduces power consumption, and offers a cost-effective solution suitable for domestic, institutional, and agricultural applications.

Keywords: IoT, Smart Water Tank, Water Level Monitoring, NodeMCU, Arduino, Firebase

Downloads: | DOI: 10.17148/IJIREEICE.2026.14109